Issues with empty htape file

[octagonz82]

If the htape doesn't give any residue the program doesn't understand how to continue... I suggest creating a no-result object to continue the execution.
In line 76, instead of:
residuals = [__readfeed(inputstr) for inputstr in inputstrs]
residuals = __addmetastable(residuals, inputstr2)
if residuals==[]:
print ("Did not find any residual nuclei. Are you sure this is a correct htape3x output?")
return None
I proposed to include:
if inputstrs == [[]]:
residuals = [[0, [000000], [0.0]]]
else:
residuals = [__readfeed(inputstr) for inputstr in inputstrs]
residuals = __addmetastable(residuals, inputstr2)
if residuals == [[0, [000000], [0.0]]]:
print (f"Did not find any residual nuclei in cell {ncell}. Are you sure this is a correct htape3x output?")

Besides, I would suggest changing every __ to_ to avoid messing with attributes